By bus
Buses (http://www.matkahuolto.fi/en/) from all over Finland stop regularly at Kokkola. If you travel as far as from Helsinki, forget the bus and take the train or plane.
By plane
Kruunupyy airport IATA: KOK (http://www.finavia.fi/airport_kruunupyy) is the closest one to Kokkola, about 20 kilometers away. Nearly all scheduled flights only to and from Helsinki, charter flights to holiday destinations around Europe. A bus service is provided to and from Mannerheimin aukio at the centre of Kokkola.
By train
Trains (http://www.vr.fi/heo/eng/...) from Helsinki connect daily. The fastest connection is by Pendolino train which will last about 4 hours.
There are also some night trains with sleeping cars from Helsinki to northern regions stopping at Kokkola. Night trains usually arrive at early morning hours in Kokkola, which is uncomfortable unless you have somebody waiting for you.
By car
The largest highway that passes through Kokkola is the E8.